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PC Power Supply Discussion Troubleshooting and discussion of computer power supplies

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Old 04-24-2012
Nathan Warawa Nathan Warawa is offline
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Default Plastic sheets that cover half the fan: why?

I've seen a number of powersupply designs with 120mm+ fans with a clear plastic sheet covering as much as half the fan.

Why?

Optimizing turbulence? Do some components like to run hotter?

WHY?! I MUST KNOW THE SECRET!
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Old 04-24-2012
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Redbeard Redbeard is offline
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Blocking the air in that regions causes a low pressure area, which forces the air through the PSU in an L-shape and out the rear of the PSU. It's basically done as a cheap and easy way to direct airflow in a PSU.

A lot of higher-end units do it less often and if they do it, they do it in smaller areas now. It was a lot more common a little while ago.
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Old 04-24-2012
allikat allikat is offline
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As Redbeard said, it's to direct the airflow, otherwise up to half the air from the fan would go straight out the back of the PSU instead of working to cool it.
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Old 04-24-2012
Nathan Warawa Nathan Warawa is offline
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Thank you. That makes sense.
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